US7198216B2 - Refining element - Google Patents
Refining element Download PDFInfo
- Publication number
- US7198216B2 US7198216B2 US10/555,195 US55519505A US7198216B2 US 7198216 B2 US7198216 B2 US 7198216B2 US 55519505 A US55519505 A US 55519505A US 7198216 B2 US7198216 B2 US 7198216B2
- Authority
- US
- United States
- Prior art keywords
- refining
- bars
- recesses
- refining element
- longitudinal edges
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000007670 refining Methods 0.000 title claims abstract description 67
- 239000002657 fibrous material Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 description 11
- 229920001131 Pulp (paper) Polymers 0.000 description 5
- 239000000835 fiber Substances 0.000 description 3
- 239000012978 lignocellulosic material Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- -1 board pulp Polymers 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C7/00—Crushing or disintegrating by disc mills
- B02C7/11—Details
- B02C7/12—Shape or construction of discs
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
- D21D1/30—Disc mills
- D21D1/306—Discs
Definitions
- the present invention relates to refiners of the disc-type, with opposed refining discs rotating relative to one another.
- the refining discs are provided with refining elements, which between themselves form a refining gap with a refining zone for working fibrous material.
- the fibrous material preferably is lignocellulosic fibrous material and the refiner is used for the manufacture of, for example, reject pulp, recycled fiber pulp and mechanical pulps, such as board pulp, thermomechanical pulp (TMP) and chemi-thermo-mechanical pulp (CTMP) and for low-concentration refining chemical pulps.
- the present invention more precisely, relates to a refining element for use in a refiner of the above kind.
- a refining element is generally formed with a pattern of bars and intermediate grooves.
- the bars and grooves are formed in different ways, depending on which fibrous material is worked and the degree of refining desired and, thus, in the case of lignocellulosic material, the pulp quality which is desired.
- the bars have an upper surface and side surfaces so that longitudinal edges are formed between the upper surface and respective side surface.
- the bars can be, for example, continuous or discontinuous, and can be arranged in different patterns.
- the working of the fibrous material is substantially carried out by the bars of the refining elements.
- the refining gap is formed so that the fibrous material, seen in the radial direction, passes from the inside outwardly.
- the refining elements are normally formed so as to bring about a first disintegration of the material and to advance the material outwardly in the refining gap.
- a certain defibering i.e. separation of the fibers of the lignocellulosic material, also takes place in the inner portion of the refining gap where the distance between the refining surfaces is the greatest. Thereafter, that distance decreases outwardly in order that the desired working or refining of the fibrous material shall be obtained.
- dams flow restrictions
- a high steam pressure is thereby created in the refining gap.
- This high steam pressure has a negative effect on the capacity and operational stability of the refiner. It also implies a limitation on the possible energy input.
- the developed steam thus, will be forced by the flow restrictions upwardly out of the grooves, and will disturb the material flow through the refining gap.
- a refining element for use with disc refiners for the processing of fibrous materials
- the refining element comprising a refining surface including a plurality of bars and intermediate grooves therebetween, the plurality of bars including an upper surface and a pair of side surfaces defining longitudinal edges therebetween, the plurality of bars including a plurality of recesses disposed along at least one of the longitudinal edges, the plurality of recesses including open portions in both the upper surface and one of the side surfaces thereof.
- the plurality of recesses are disposed along only one of the longitudinal edges. In another embodiment, the plurality of recesses are disposed along both of the longitudinal edges.
- the upper surface includes a predetermined central point substantially at the center of the upper surface of the plurality of bars, and wherein the plurality of recesses extend inwardly from the one of the side surfaces to the predetermined central point.
- the plurality of recesses have a depth of from 2 to 5 mm as measured from the longitudinal edge.
- the plurality of recesses have a width of from 2 to 5 mm.
- the plurality of recesses are spaced apart a distance of from 1 to 10 mm.
- the plurality of recesses form an angle of from 45° to 90° with respect to the plurality of bars, as measured in the intended direction of flow of the fibrous material along the refining surface.
- the plurality of recesses are disposed substantially across the plurality of bars.
- the bars are provided with a plurality of recesses, which are arranged in the longitudinal edges of the bars.
- the recesses are directed across the bars or so as to form an angle of at least 45° with the bars.
- the recesses are open both to the upper surface of the bars and to one side surface or to both side surfaces.
- the recesses can be placed, for example, along the entire length of the bars or can be broken off by small portions without recesses, measured in the longitudinal direction of the bars.
- Each recess can have a constant or a varying depth along the bars in the upper surface and side surfaces of the bars.
- the recesses can be formed only on one side or on both sides of the bars.
- FIG. 1 is a top, elevational, front side view of a refining segment with a pattern of bars and intermediate grooves;
- FIG. 2 is an enlarged, top, elevational view of the upper surface of the bars used in the present invention
- FIG. 3 is an enlarged, top, elevational view of the upper surface of the bars of another embodiment of the present invention.
- FIG. 4 is a side, elevational, cross-sectional view of one alternative of the embodiment shown in FIG. 2 ;
- FIG. 5 is a side, elevational, cross-sectional view of another alternative of the embodiment shown in FIG. 2 .
- FIG. 1 shows a refining element 10 intended for refining fibrous material having a high concentration.
- the refining element 10 is provided with a pattern of bars 11 and intermediate grooves 12 , in which the bars have upper surfaces 13 and side surfaces 14 with edges 15 .
- the pattern is divided into two zones, an inner zone 16 and an outer zone 17 , where the bars and grooves in the inner zone are coarser than in the outer zone.
- the bars in the inner zone are intended to bring about a first disintegration of the material and to advance the material outwardly to the outer zone.
- the bars in the outer zone are more tightly arranged, which yields more bar edges for effecting the substantial working and refining of the fibrous material.
- the pattern can also comprise more zones, where the pattern is usually made tighter from zone to zone, as seen radially outwardly.
- FIG. 2 shows one embodiment of a bar 11 on a refining element according to the present invention.
- the recesses are arranged slightly angularly in relation to the longitudinal direction of the bars and are open both to the upper surface 13 and the side surface 14 .
- the recesses can suitably extend to about the center of the upper surface of the bar.
- the depth of the recesses, as measured from the edge, are one or some millimeters, preferably 2–5 mm.
- the width should also be one or more millimeters, preferably 2–5 mm. Bars thereby have toothed edges.
- the distance between adjacent recesses should be 1–10 mm, preferably 2–5 mm.
- FIG. 3 shows another embodiment of a bar 11 .
- the recesses 18 are located at both edges 15 of the bar, so that both edges of the bar are toothed.
- the same dimensions apply as in the case of the FIG. 2 embodiment.
- the recesses on opposed edges 15 are suitably offset, so that they do not lie directly in front of each other. This implies that a refining element with such bars can rotate in both directions.
- the form of the bottom of the recesses 18 can be rectilinear, as shown in FIG. 4 , or curved, as shown in FIG. 5 . Other forms can also be imagined.
- the recesses are arranged across the bars or form an angle of at least 45° with respect to the longitudinal direction of the bars. This applies primarily to the surface, which outwardly defines a recess 18 , as measured in the direction of flow of the material. When the recesses 18 are angular, they extend from the side surfaces 14 obliquely outwardly, as measured in the direction of flow of the material.
- Bars with a configuration according to the present invention can be placed on any zone on the refining element, but preferably in an outer zone where the working and refining are most intensive and the distance between opposed refining elements is the shortest, i.e. where the refining gap is the smallest and the steam development the greatest.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Paper (AREA)
- Crushing And Grinding (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0301535-2 | 2003-05-23 | ||
SE0301525A SE526198C2 (sv) | 2003-05-23 | 2003-05-23 | Malelement för malapparater av skivtyp för bearbetning av fibermaterial |
PCT/SE2004/000678 WO2004103567A1 (en) | 2003-05-23 | 2004-05-05 | Refining element |
Publications (2)
Publication Number | Publication Date |
---|---|
US20060202074A1 US20060202074A1 (en) | 2006-09-14 |
US7198216B2 true US7198216B2 (en) | 2007-04-03 |
Family
ID=20291401
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/555,195 Expired - Lifetime US7198216B2 (en) | 2003-05-23 | 2004-05-05 | Refining element |
Country Status (8)
Country | Link |
---|---|
US (1) | US7198216B2 (zh) |
EP (1) | EP1635950A1 (zh) |
JP (1) | JP2007501124A (zh) |
CN (1) | CN100417448C (zh) |
BR (1) | BRPI0410769A (zh) |
CA (1) | CA2524301A1 (zh) |
SE (1) | SE526198C2 (zh) |
WO (1) | WO2004103567A1 (zh) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090045278A1 (en) * | 2004-10-21 | 2009-02-19 | Ulrich Bech | Crushing element and mills with grinding bodies, mixers, extruders and a pressing worm provided with said crushing elements |
US11566374B2 (en) * | 2017-12-01 | 2023-01-31 | Valmet Ab | Refining plate provided with refining bars having edge creating bar cavities |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9604221B2 (en) * | 2012-11-09 | 2017-03-28 | Andrtiz Inc. | Stator refiner plate element having curved bars and serrated leading edges |
US20140174688A1 (en) * | 2012-12-26 | 2014-06-26 | Andritz Inc. | Teeth for disperser plate having grooves and taper |
WO2015019986A1 (ja) * | 2013-08-05 | 2015-02-12 | シャープ株式会社 | 臼およびそれを備えた飲料製造装置 |
DE102013114699A1 (de) * | 2013-12-20 | 2015-06-25 | Cvp Clean Value Plastics Gmbh | Vorrichtung zum Entfernen von Verunreinigungen auf Kunststoffschnipseln |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4023737A (en) | 1976-03-23 | 1977-05-17 | Westvaco Corporation | Spiral groove pattern refiner plates |
FI53469B (zh) | 1976-07-02 | 1978-01-31 | Enso Gutzeit Oy | |
US4712745A (en) * | 1985-06-06 | 1987-12-15 | Leith William C | Rotating disc wood chip refiner |
US5165592A (en) | 1992-03-31 | 1992-11-24 | J & L Plate, Inc. | Method of making refiner plate bars |
US5467931A (en) | 1994-02-22 | 1995-11-21 | Beloit Technologies, Inc. | Long life refiner disc |
US5690286A (en) | 1995-09-27 | 1997-11-25 | Beloit Technologies, Inc. | Refiner disc with localized surface roughness |
WO2000056459A1 (en) * | 1999-03-19 | 2000-09-28 | Valmet Fibertech Ab | Refining element |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN86101156A (zh) * | 1985-03-13 | 1986-09-10 | 美商贝诺特公司 | 匀浆盘装置 |
-
2003
- 2003-05-23 SE SE0301525A patent/SE526198C2/sv not_active IP Right Cessation
-
2004
- 2004-05-05 WO PCT/SE2004/000678 patent/WO2004103567A1/en active Application Filing
- 2004-05-05 BR BRPI0410769-1A patent/BRPI0410769A/pt not_active IP Right Cessation
- 2004-05-05 CA CA002524301A patent/CA2524301A1/en not_active Abandoned
- 2004-05-05 JP JP2006532175A patent/JP2007501124A/ja not_active Withdrawn
- 2004-05-05 US US10/555,195 patent/US7198216B2/en not_active Expired - Lifetime
- 2004-05-05 EP EP04731274A patent/EP1635950A1/en not_active Withdrawn
- 2004-05-05 CN CNB2004800139146A patent/CN100417448C/zh not_active Expired - Lifetime
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4023737A (en) | 1976-03-23 | 1977-05-17 | Westvaco Corporation | Spiral groove pattern refiner plates |
FI53469B (zh) | 1976-07-02 | 1978-01-31 | Enso Gutzeit Oy | |
US4712745A (en) * | 1985-06-06 | 1987-12-15 | Leith William C | Rotating disc wood chip refiner |
US5165592A (en) | 1992-03-31 | 1992-11-24 | J & L Plate, Inc. | Method of making refiner plate bars |
US5467931A (en) | 1994-02-22 | 1995-11-21 | Beloit Technologies, Inc. | Long life refiner disc |
US5690286A (en) | 1995-09-27 | 1997-11-25 | Beloit Technologies, Inc. | Refiner disc with localized surface roughness |
WO2000056459A1 (en) * | 1999-03-19 | 2000-09-28 | Valmet Fibertech Ab | Refining element |
SE513807C2 (sv) | 1999-03-19 | 2000-11-06 | Valmet Fibertech Ab | Malelement avsett för malapparater av skivtyp för bearbetning av fibermaterial |
US6592062B1 (en) * | 1999-03-19 | 2003-07-15 | Valmet Fibertech Ab | Refining element |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090045278A1 (en) * | 2004-10-21 | 2009-02-19 | Ulrich Bech | Crushing element and mills with grinding bodies, mixers, extruders and a pressing worm provided with said crushing elements |
US11566374B2 (en) * | 2017-12-01 | 2023-01-31 | Valmet Ab | Refining plate provided with refining bars having edge creating bar cavities |
Also Published As
Publication number | Publication date |
---|---|
SE0301525L (sv) | 2004-11-24 |
WO2004103567A1 (en) | 2004-12-02 |
CN100417448C (zh) | 2008-09-10 |
EP1635950A1 (en) | 2006-03-22 |
JP2007501124A (ja) | 2007-01-25 |
SE0301525D0 (sv) | 2003-05-23 |
US20060202074A1 (en) | 2006-09-14 |
SE526198C2 (sv) | 2005-07-26 |
CA2524301A1 (en) | 2004-12-02 |
CN1791465A (zh) | 2006-06-21 |
BRPI0410769A (pt) | 2006-06-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: METSO PAPER, INC., FINLAND Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VIRVING, NILS;REEL/FRAME:017074/0040 Effective date: 20051010 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
AS | Assignment |
Owner name: VALMET TECHNOLOGIES, INC., FINLAND Free format text: CHANGE OF NAME;ASSIGNOR:METSO PAPER, INC.;REEL/FRAME:032551/0426 Effective date: 20131212 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 12TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1553); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 12 |